Question

Reduce 7y + 2y 2 - 7 by 3 - 4y.

Answer 1

$2y^2+11y-10$

Answer 2

Reduce 7y + 2y^2 - 7 by 3 - 4y.
its mean subtract 3 - 4y from 7y + 2y^2 - 7
so
7y + 2y^2 - 7 - (3 - 4y)
= 2y^2 + 7y -7 - 3 + 4y
= 2y^2 + 11y - 10

hope it helps